1-ethers, thioethers and esters of 4,5,6,7,10,10-hexachloro-4,7-methylene-4,7,8,9-tetrahydrophthalane



l-ETHERS, THIOETHERS AND ESTERS F 4,5,6,7,

10,10-HEXACHLORO 4,7 METHYLENE 4,7,15,9- TETRAHYDROPHTHALANE Hans Feichtinger and Siegfried Puschhof, Duisburg-Beeck, Germany, assignors to Ruhrchemie Aktiengeseilschaft, Oberhausen-Holten, Germany, a corporation of Germany No Drawing. Application November 5, 1956 Serial No. 620,217

Claims priority, application Germany November 5, 1955 4 Claims. (Cl. 260346.2)

This invention relates to, and has as its object, the production of l-ethers, thioethers and esters of 4,5,6,7,10,10- hexachloro-4,7 methylene 4,7,8,9 tetrahydrophthalane which have been found to constitute excellent insecticides, fungicides and bactericides, which are useful forpharmaceutical purposes, and for the synthesis of further derivatives.

The l-ethers, thioethers and esters, in accordance with the invention, have the general formula:

XR 01 l in which X represents 0, S, or the group, and R represents a saturated or unsaturated alkyl radical or aryl radical, which may contain additional substituents such as chlorine atoms.

The novel ethers, thioethers and esters, in accordance with the invention may be produced from the known 4,5,

6,7 ,1'0,10 hexachloro-4,7-methylene 4,7,8,9 tetrahydro- Surprisingly, this bromination does not proceed in the same manner of the chlorination, which gives an excellent yield of 1,3,4,5,6,7,l0,10-octachloro-4,7-methylene-4,7,8, 9-tetrahydrophthalane.

The bromination may be effectedv in the conventional manner with any of the known or conventional bromination agents as, for example, bromine or bromosuccinimide.

The monobromo derivative is obtained in a yield of 92% of the theoretically possible yield and in addition to constituting. the startingproduct for the formation of the 2,881,187 Patented Apr. 7, 1959 ethers, thioethers and esters in accordance with the invention may be used for a number of other reactions.

In order to produce the l-ethers and l-thioethers in accordance with the invention, the starting l-bromo com pound is reacted with an alcohol, phenol or mercaptan and the reaction proceeds as follows:

in which Y represents oxygen or sulfur and R is as set forth above, as, forexample, one of the following radi- C a, 2 5 ffl slz, (CH2)2CH3: fls a CH(CH CH CH CH cl, CH CH=CH C H C H -pCl.

In order to form the l-esters, the starting l-bromo compound is reacted with an organic acid anhydride, in accordance with the following reaction scheme:

in which R is as set forth above.

The reactions with the alcohols, phenols and mercaptans or organic acid anhydrides can be efiected in a very simple manner by merely contacting the reactants at a temperature between about 50-200 C. as, for example, by heating the same under a reflux condenser or in a closed tube. After the conversion, the reaction product may be freed by distillation from the component which is used in excess. The pure compound may then be obtained by distillation under vacuum, and preferably under a high vacuum, or by crystallization.

As mentioned, the novel compounds produced in accordance with the invention constitute excellent insecticides, fungicides or bactericides, and exhibit pharmaceutically valuable properties. Due to their structure, the new compounds may also be used for the production of various further derivatives.

The fol-lowing examples are given by way of illustration and not limitation:

Example 1 34.4 grams (0.100 mol) of 4,5,6,7,10,10-hexachloro- 4,7-methylene-4,7,8,9-tetrahydrophthalane were dissolved in 200 cc. of carbon tetrachloride. The solution was heated to the boiling temperature and, while irradiating with ultra-violet light, 17 grams of bromine were added dropwise to the boiling solution within one hour. Upon completion of the reaction, the solvent was distilled olf under vacuum and the residue was recrystallized from petroleum ether. A yield of 39.8 grams (92% of the theoretical yield) of 1-bromo-4,5,6,7,10,10-hexachloro-4, 7-methylene-4,7,8,9-tetrahydrophthalane melting at C. was obtained.

Formula: C H OCl Br. Molecular weight: 421.79.

Calculated, Found,

percent percent Example 2 137.0 grams (0.400 mol) of 4,5,6,7,10,1'0-hexachloro- 4,7-methylene-4,7,8,9-tetrahydrophthalane, 142 grams of Example 3 4.2 grams (0.010 mol) of 1-bromo-4,5,6,7,10,lO-hexachloro-4,7-methylene-4,7,8,9 tetrahydrophthalane were refluxed with 16 grams (0.500 mol) of methyl alcohol for 8 hours. The solution was then concentrated under vacuum to about 14-. of its volume. After cooling of the residue to ----10 C., 1-methoxy-4,5,6,7,10,10-hexachloro- 4,7-methylcue-4,7,8,9-tetrahydrophthalane melting at 95 C. crystallized in an almost quantitative yield.

Formula: c ri o ca. Molecular weight: 372.90.

Calculated Found,

percent percent 82. 21 82. 08 H 2. l2 2. 88 0 8. 58 8. 34 m 67. 05 57. 66

Example 4 By refluxing the bromide formed in Example 1 with the corresponding alcohols for 8 hours in the manner described in Example 3, the following l-alkoxy com- 4 Formula: C H O CI- Molecular weight: 463.46.

Calculated, percent Found, percent Example 7 Calculated, percent Found, percent Example 8 8.4 grams (0.019 mol) of bromo-4,5,6,7,10,10-hexnchloro 4,7 methylene-4,7,8,9-tetrahydrophthalane and 2.8 grams (0.0297 mol) of phenol were heated for 8 hours on a water bath. The reaction product which was dissolved in about 50 cc. of ether was washed with caustic soda solution to remove the excess phenol. The remain- Pounds were produced mg ether phase was concentrated by evaporation and the residue was distilled under vacuum. l-phenoxy- Melting R t fl 4,5,6,7,l0,10 hexachloro 4,7 methylene-4,7,8,9-tetra- Dy an enm" hydrophthalane having a boiling point of 170-180 C. at 0.009 mm. Hg was obtained in amount of 6.1 grams l-ethoxy-4.5.6,7,10.10-hexacbloro-4,7-methyl- (70% of the theoreucal yield) 1.3' aii6li 'f$li&?..41 math 1- gne 4 I, 8,9 teti'ahdro mmlaneuflnunzu 011 1.5345 5535?- 3:; l-butoxy 4,5,6,7,l0.l0- exachloro-4,7 methylp6 W cue-4.7.8.9-tetrahydrophthalane oil 1. 6295 0 41.41 41.0: H as: 2.00 Example 5 m 8.4 grams (0.019 mol) of 1-bromo-4,5,6,7,10,10 hexa- Example 9 chloro-4,7-methylene 4,7,8,9 tetrahydrophthalane and 16.0 grams (0.199 mol) of l-chlorethanol-(2) were heatgrams 11101) of thc starting bmmldfi 0f ed for 8 hours on a water bath and the reaction product was processed by vacuum distillation. This resulted in a yield of 8.2 grams (98% of the theoretical yield) of l-(B-chlorethoxy) 4,5,6,7,10,10-hexachloro-4,7-methylone-4,7,8,9-tetrahydrophthalane having a boiling point of 135-145 C. at 0.08 mm. Hg and a refractive index, u of 1.5490.

Formula: CuHgOgClq. Molecular weight: 421.38.

Calculated, Found percent percent 0 31.35 ates n 2. 16 2.2:;

Example 6 Example 8 and 2.0 grams (0.0155 mol) of p-chlorphenol were reacted and treated in the manner described in Example 8. l (p-chlorphenoxy) 4,5,6,7,10,10 hexachloro4,7-methylene-4,7,8,9-tetrahydrophthalane having a boiling point of 180-190 C. at 0.01 mm. Hg was obtained in amount of 25% of the theoreticallypossible yield.

Formula: C15H9O Cl7. Molecular weight: 469.42.

Calculated, Found,

percent percent 0 88. 87 38. 21 F1 1. 2. 06 m 52. 87 B2. 40

Example 10 mercapto 4,5,6,7,l0,10rhexachloro-4,7-methylene-4,7,8,

9-tetrahydrophthalane having a boiling point of C. at 0.02 mm. Hg and a refractive index, a

5 of 1.5668 could be isolated in amount of 3.5 grams (87% of the theoretical yield). I w p H V I I Iformula: C H OSCI Molecular weight: 406.99;

Calculated, 1 11 71,

percent percent Example 11 8.4 grams (0.019 mol) of 1-bromo-4,5,6,7,10,10-hexachloro-4,7-methylene-4,7,8,9-tetrahydrophthalane and 2.2 grams (0.020 mol) of phenyl mercaptan were heated Example 12 3.4 grams (0.019 mol) of 1-bromo-4,5,6,7,10,10-hexachloro 4,7-methylene-4,7,8,9-tetrahydrophthalane and 20.5 grams (0.201 mol) of acetic anhydride were heated for 8 hours with the use of a reflux condenser. The reaction product obtained was freed from excessive acetic anhydride and acetyl bromide under vacuum. The crystalline residue was recrystallized from petroleum ether. The yield comprised 7.0 grams (87.5% of the theoretical yield) of 1-acetoxy-4,5,6,7,10,l0-hexachloro-4,7-methylcue-4,7,8,9-tetrahydrophthalane having a melting point of 129 C.

Formula: C H O Cl Molecular weight: 400.92.

Calculated, Found,

percent percent The compounds produced in accordance with the invention constitute good insecticides. The method of their use is the same as that conventional for known insecticides.

The compounds produced by the process of the invention may be formulated to dusting agents, emulsions, spray powders, sprays or aerosols.

Dusting agents and spray powders are prepared with the use of conventional inert diluents, e. g. talc, kaolin, bleaching earth, kieselguhr, limestone or calcined magnesia. Emulsions of the compounds of the invention can be prepared by means of acetone, benzene, xylene or other hydrocarbons as well as with suitable higher alcohols. Use is made in this case of emulsifiers, e.g. high molecular weight condensation products of fatty alcohols and ethylene oxide, the addition of which in conventional manner results in a particularly satisfactory emulsication. Sprays and aerosols may be prepared by mixing the compounds of the invention with low boiling hydrocarbons. Suitable preparations are, for example, obtained by admixture of 90-99 parts of fiuor-trichlormethane or di-fluor-dichlormethane.

As far as the compounds are soluble in organic solvents, it is preferable to use them dissolved in acetone or hydrocarbons, e.g. petroleum ether.

The insecticidal efliciency of compounds according to the invention was determined in the following manner:

One milligram of each of the compounds being tested and previously dissolved in petroleum ether or acetone was placed into flat dishes of 10 cm. in diameter previded with a vertical rim of about 1.5 cm. in width (Petri dishes). The solution was in each case evenly distributed over the bottom of the glass dishes and then the solvent was evaporated. Thereafter, 20 female animals of Milsca domst'icr'rwhichwere four days old were placed in eachv of the dishes. The mortality of the test animals was then determined as a function of the residence time of the animals.

The efiiciencies of the compounds of the invention were as follows:

Percent mortality after- Compounds 1 hr. 2 hrs. 5 hrs. 24 hrs.

1 propoxy 4.5.6.7.10.10-hexachloro- 4.7-methylene-4.7.8.9-tetrahydrophthalane 1 (B ehlorethoxy) 4.5.6.7.10.10 hexachloro 4,7 methylene 4.7. 8.9 tetrahydrophthalane 1 allyloxy 4.5.6.7.10.10 hexachloro- 4.7 -methylene -4.7.8.9- tetrahydrophthalane 1 ethylmercapto 4.5.6.7.10J0 hexachloro 4.7 methylene 4.7.8.9 tetrahydrophthalane 1 acetoxy 4.5.6.7.10.10 hexachloro 4.7 methylene 4.7.8.9 tetrahydrophthalane 5 5 5 The data given above indicate that the process of the invention permits the production of compounds which possess a surprisingly high efiiciency as insecticides.

We claim:

1. A tetrahydrophthalane derivative having the formula:

in which X is a member selected from the group consisting of O, S, and the group, and R is a member selected from the group consisting of lower alkyl and lower olefinic radicals, the phenyl radical and monochloro-substituted members of said latter group.

2. A tetrahydrophthalane derivative having the formula:

| 01- -Cl 0 C1 4. Process for the production of l-ethers, thioethers and esters from hexachloro-methylene-tetrahydrophthalane, which comprises bromating 4,5,6,7,10,10-hexach1or0- 4,7-methylene-4,7,8,9-tetrahydrophthalane by reacting said 4,5,6,7,10,10-hexachloro-4,7-methylene-4,7,8,9-tetrahydrophthalane with N-bromo-succinimide in the presence of benzoyl peroxide, to thereby form 1-bromo-4,5, 6,7,10,10 hexachloro-4,7-methylene-4,7,8,9-tetrahydrophthalane, and thereafter converting said l-bromohexachloro-methy1ene-tetrahydrophtha1ane with a member selected from the group. consisting of lower alkyl alcohols, lower olefinic alcohols, phenols, ethyl mercaptan, phenyl mercaptan and acetic acid anhydride and monochlorosubstituted members of said group, at a temperature between about 50 and 200 C., and recovering the reaction product formed.

No references cited.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No, 2,881,187 April '7, 1959 Hans Feichtinger et al,

It is herehj certified that error appears in the -printed specification of the above "numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 2 line 61, for "Formula: 6 111 001912 read me Formula: C H OGl Br 8 column 4, line 6-,, in the table, first column thereof for "G" read r-- C column 5, lines 65 and 66, for "emulsication" read emulsification; column 6, line 72, for "anhydrochloride" read M anhydride' column 8, line 3y for "phenols read he phenol s x,

Signed and sealed vthis v21st day of July 1959 SEAL) ttest:

KARL AXLINE ROBERT (J. WATSON Attesting Oflicer v Commissioner of Patents 

1. A TETRAHYDROPHTALANE DERIVATIVE HAVING THE FORMULA: 